Anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainfall runoff

Abstract

The invention discloses an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff, and relates to the technical field of environmental monitoring, the anti-adsorption low-temperature automatic sampling device comprises a collection frame, a protection frame is mounted on one side of the collection frame, a rainwater collection rotary table is rotatably mounted in the middle of the upper end of the collection frame, and a pressurization flushing device is mounted on one side, close to the rainwater collection rotary table, of the collection frame; a dynamic negative pressure regulation and control box is installed on the face, close to the pressurizing flushing device, of the collecting frame, a power distribution control device is installed on the outer surface of the collecting frame, collecting pipes are evenly arranged in the collecting frame, and the device adopts a split module design (a purification bin, a filter plate frame, a liquid collecting funnel and the like can be slidably detached) and is convenient to maintain and replace. The flow path coating technology and the three-stage filtering module not only aim at antibiotics, but also can be compatible with collection of other trace organic pollutants (such as drug residues and endocrine disrupters). The protection frame is integrated with a semiconductor refrigeration system, so that the stability of equipment in a high-temperature environment is expanded, and the reliability of long-term monitoring is improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental monitoring, in particular to an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff. Background Art

[0002] Antibiotics are widely used in medicine, animal husbandry, agriculture, and other fields. Unabsorbed antibiotics can enter the environment through sewage discharge, manure fertilization, and other pathways. Rainwater runoff washes over land surfaces (such as farmland, urban green spaces, and areas surrounding sewage treatment plants), carrying residual antibiotics into water bodies (rivers, lakes, groundwater, etc.), becoming a significant vector for antibiotic spread. Collecting runoff samples can help determine the scope and extent of contamination.

[0003] However, antibiotic concentrations in urban rainwater runoff are low (ng / L to μg / L) and complex, making traditional open-top samplers susceptible to sample loss through volatilization, photolysis, and container adsorption. Conventional automatic samplers lack the ability to store antibiotics in the cold and dark, leading to sample degradation during collection and transportation. Suspended particles in rainwater can adsorb antibiotics, making standard filter membranes prone to clogging and unable to separate dissolved and particulate targets. Existing rainwater samplers fail to address the adsorption of trace organic matter. Furthermore, existing low-temperature sampling devices lack integrated in-situ filtration, and the flow system presents a risk of cross-contamination.

[0004] Therefore, an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff are proposed to solve the above problems. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to propose an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff to solve the problems of antibiotic collection degradation and collection blockage in the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff, comprising a collection frame, a protective frame installed on one side of the collection frame, a rainwater collection turntable rotatably installed in the middle of the upper end of the collection frame, a pressurized flushing device installed on the side of the collection frame close to the rainwater collection turntable, a dynamic negative pressure control box installed on the side of the collection frame close to the pressurized flushing device, a power distribution control device installed on the outer surface of the collection frame, collection tubes evenly arranged in the collection frame, and an adjustable anti-blocking mechanism and a dynamic storage switching mechanism;

[0007] The adjustable anti-clogging mechanism is arranged on the rainwater collection turntable, and the adjustable anti-clogging mechanism is used for dynamic adjustment of sewage collection;

[0008] The dynamic storage switching mechanism is arranged in the collection rack, and the dynamic storage switching mechanism is used for automatic collection and storage of rainwater antibiotics.

[0009] Preferably, the adjustable anti-clogging mechanism includes an electric cylinder, which is installed on a rainwater collecting turntable, and a shaft connecting plate is installed on the driving shaft of the electric cylinder, and a support rod is fixedly installed on the connecting plate away from the driving shaft, one end of the support rod is fixedly connected to a dirt pushing plate, and the other end of the support rod is fixedly connected to a baffle, and the dirt pushing plate and the baffle are both slidably installed on the rainwater collecting turntable, and a first filter screen is provided at the bottom of the dirt pushing plate and the baffle, and the first filter screen is fixedly installed on the rainwater collecting turntable, and compression and tension springs are evenly fixedly connected to the dirt pushing plate, and the compression and tension springs are fixedly connected to the rainwater collecting turntable away from the dirt pushing plate.

[0010] Preferably, flushing heads are evenly installed on the rainwater collecting turntable near the bottom of the compression and tension spring, and the flushing heads are fixedly connected to the pressurized flushing device through a hose. The bottom of the rainwater collecting turntable away from the flushing head is symmetrically provided with guide grooves, and a guide cover is fixedly installed on the outside of the guide groove. A waterproof sealing gasket is installed at the connection between the guide cover and the guide groove, and a guide pipe is fixedly connected to the bottom of the guide cover, and the guide pipe is fixedly connected to a purification bin at one end away from the guide cover, and both sides of the purification bin are slidably installed on the inner wall of the collection frame.

[0011] Preferably, the adjustable anti-clogging mechanism also includes a dynamic filtering component, which includes a filter plate rack, which is slidably installed in the purification chamber, and the filter plate rack is respectively installed with a second filter screen, a glass fiber membrane and a hydrophilic PTFE membrane, the second filter screen is installed on the inner wall of the upper end of the filter plate rack, and the second filter screen is installed on the inner wall of the middle part of the filter plate rack. The hydrophilic PTFE membrane is installed on the filter plate rack close to the bottom of the glass fiber membrane, and a dynamic adjustment groove is provided in the collection rack, the filter plate rack and the purification chamber, and an electric control valve is installed on the side of the dynamic adjustment groove close to the dynamic negative pressure control box.

[0012] Preferably, the dynamic filtration component also includes a feed pipe, the upper end of the feed pipe is fixedly connected to the bottom of the purification bin, the lower end of the feed pipe is fixedly installed with a valve control device, the bottom of the valve control device is connected to an infusion pipe, one side of the valve control device is fixedly connected to a drainage pipe, and the end of the drainage pipe away from the valve control device is fixedly connected to a liquid collecting funnel, both ends of the liquid collecting funnel are slidably installed in the collection frame, an isolation plate is installed on the outer surface of the upper end of the feed pipe, and both ends of the isolation plate are slidably installed on the inner wall of the collection frame for isolation and temperature control at the bottom of the collection frame.

[0013] Preferably, the dynamic storage switching mechanism includes a main driving wheel, which is symmetrically rotatably mounted on the inner wall of the collection frame, a micro motor is mounted on the collection frame near the outer surface of the main driving wheel, and the micro motor drive shaft is fixedly mounted in the middle of the main driving wheel, and a driven wheel is rotatably mounted on one side of the collection frame near the main driving wheel, an L-shaped cross-section driving disk is slidably mounted on the outer surface of the main driving wheel and the driven wheel, the L-shaped cross-section driving disk is rotatably mounted on the inner wall of the collection frame, and a horizontal pull plate is rotatably connected to the L-shaped cross-section driving disk.

[0014] Preferably, the horizontal pull plate is fixedly connected to a mounting shaft in the middle of one end away from the L-shaped cross-section driving disk, the outer surface of the mounting shaft is rotatably connected to a balance disk, the middle of the balance disk is rotatably connected to the inner wall of the collection rack, a storage rack is fixedly mounted on the mounting shaft, a test tube cover is evenly fixedly connected to the bottom of the storage rack, the collection tube is installed in the test tube cover, a positioning monitoring device is installed on the inner wall of the collection rack near the upper side of the balance disk, and a liquid level monitoring device is installed on the inner wall of the collection rack near the dynamic negative pressure control box, which is used to monitor the liquid level in the collection tube.

[0015] The anti-adsorption low-temperature automatic sampling method for antibiotics in urban road rainwater runoff includes:

[0016] S1, Sampler Pretreatment and Cleaning: Select a location that represents the characteristics of road rainwater, is safe, and is easily accessible for maintenance to install the sampler. After installation, the device will automatically perform a high-pressure flushing operation through the booster flushing device when powered on. High-pressure water is ejected through the flushing head to flush the key sampling inlet and filter area, removing any impurities that may remain in the device to ensure a clean start.

[0017] S2, dynamic monitoring and data collection: A sensor is installed at the rainwater inlet to continuously monitor the water level or water flow in the drainage pipe. When the rainwater flow reaches the preset "sampling required" threshold, the sensor will send a signal to automatically start the sampling process. The driving cylinder at the bottom of the rainwater collection turntable adjusts the angle of the rainwater collection turntable to control the water flow rate through the rainwater collection turntable angle controller.

[0018] S3, Dynamic Control and Filtration: The system automatically adjusts the angle of the rainwater collection turntable below based on the amount of rainwater flow at the inlet to optimize filtration. It also dynamically controls the opening of a drain valve in a dynamic negative pressure control box. This valve diverts some water to prevent subsequent filtration devices and collection containers from clogging due to excessive water and impurities.

[0019] S4, constant temperature collection and storage: The positioning monitoring device controls the start and stop of the micro-motor in the middle of the main drive wheel. At the same time, the liquid level monitoring device installed on the inner wall of the collection rack is used to monitor the liquid level in the collection tube. When the liquid level in the collection tube exceeds the threshold, the micro-motor is controlled by electrical connection to switch to collection, and the temperature of the collected sample is controlled at the same time;

[0020] S5, sample recovery and testing: When a certain amount of rainwater is collected in the collection tube, the liquid level monitoring device sends a signal to the distribution control device to stop collecting rainwater. At this time, the adjustable anti-blocking mechanism is used to push and clean the filter residue above the rainwater collection turntable. At the same time, the collection information is sent to the cloud platform through the distribution control device to prompt the end of sample collection in this area.

[0021] Preferably, the bottom of the rainwater collection turntable and the purification chamber are provided with a titanium alloy matrix nano-ceramic coating flow path, and the filter plate frame is installed with a three-stage in-situ dynamic filtration module, a deep-cold independent storage unit and a multi-parameter intelligent triggering system.

[0022] Preferably, the nano-ceramic coating is formed by plasma spraying of TiO2-Al2O3, with a surface roughness Ra≤0.1μm and a water contact angle>150°. The three-stage in-situ dynamic filtration module consists of a second filter screen, a glass fiber membrane and a hydrophilic PTFE membrane. The deep cold storage unit includes a semiconductor refrigeration module and a collection tube for pre-packaged anti-degradation agent.

[0023] Compared with the prior art, the anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff provided by the present invention has the following beneficial effects:

[0024] 1. Highly effective anti-adsorption and sample integrity assurance;

[0025] The device significantly reduces the adsorption of antibiotics onto the surface of the flow path through a titanium alloy-based nano-ceramic coating (surface roughness Ra ≤ 0.1 μm, water contact angle > 150°) and a three-stage in-situ dynamic filtration module (second filter, glass fiber membrane, hydrophilic PTFE membrane). Combined with a cryogenic independent storage unit (semiconductor refrigeration + pre-packaged antidegradants), samples are stored at low temperatures (below 4°C) in the dark throughout the process, effectively addressing the degradation of trace antibiotics due to volatilization, photolysis, and adsorption, ensuring the accuracy of test data.

[0026] 2. Intelligent anti-blocking and dynamic adaptability;

[0027] An adjustable anti-clogging mechanism (electric cylinder-driven pusher / baffle to clean the filter) and a dynamic negative pressure control box divert rainwater and adjust the collection turntable angle in real time based on flow rate. A three-stage filtration module, combined with a pressurized flushing device (high-pressure flushing head) and valve control, automatically cleans debris and diverts excess water during heavy rain or high impurity loads, preventing filter clogging and adapting to complex and changing environmental conditions.

[0028] 3. Full process automation and precise control;

[0029] Integrated multi-parameter intelligent trigger system (flow / liquid level / positioning sensor) and dynamic storage switching mechanism:

[0030] The sampling program is automatically started when the rainwater flow reaches the threshold; the liquid level monitoring device links the micro motor to switch the collection tube to ensure that the single tube sample does not exceed the amount; the positioning monitoring device controls the horizontal rotation of the storage rack to prevent the sample from tilting and leaking; after the sampling is completed, the residue is automatically cleaned up and a notification is pushed through the cloud platform to realize unattended operation.

[0031] 4. Modular design and multifunctional expandability;

[0032] The device features a split modular design (the purification chamber, filter plate holder, and collection funnel are slidably removable) for easy maintenance and replacement. Its flow path coating technology and three-stage filtration module are not only suitable for collecting antibiotics, but also for other trace organic pollutants (such as drug residues and endocrine disruptors). The protective frame integrates a semiconductor cooling system, extending the device's stability in high-temperature environments and enhancing the reliability of long-term monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 This is an auxiliary schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the structural connection relationship of the adjustable anti-blocking mechanism of the present invention;

[0036] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0037] Figure 5 This is an auxiliary schematic diagram of the structural connection relationship of the dynamic filtering component of the present invention;

[0038] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0039] Figure 7 This is a schematic diagram of the decomposition of the dynamic filtering component structure connection motion state of the present invention;

[0040] Figure 8 A schematic diagram of the structural connection relationship of the dynamic storage switching mechanism of the present invention;

[0041] Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle.

[0042] In the picture:

[0043] 1. Collection rack; 11. Protection rack; 12. Power distribution control device; 13. Rainwater collection turntable; 14. Pressurized flushing device; 15. Dynamic negative pressure control box; 16. Collection pipe;

[0044] 2. Adjustable anti-clogging mechanism; 21. Electric cylinder; 22. Support rod; 23. Sewage push plate; 24. Baffle; 25. First filter; 26. Tension spring; 27. Flushing head; 28. Diversion cover; 29. ​​Diversion pipe;

[0045] 3. Dynamic filtration assembly; 31. Purification chamber; 32. Filter plate rack; 33. Second filter screen; 34. Glass fiber membrane; 35. Hydrophilic PTFE membrane; 36. Feed pipe; 37. Valve control device; 38. Drain pipe; 39. Liquid collecting funnel;

[0046] 4. Dynamic storage switching mechanism; 41. Main drive wheel; 42. Driven wheel; 43. L-section drive disc; 44. Horizontal pull plate; 45. Balance disc; 46. Positioning monitoring device; 47. Storage rack; 48. Test tube cover; 49. Mounting shaft; 401. Liquid level monitoring device. DETAILED DESCRIPTION

[0047] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0049] Example 1, please refer to Figures 1 to 9 As shown:

[0050] To solve the problems mentioned in the technical solution, the embodiment of the present application provides an anti-adsorption low-temperature automatic sampling device and method for antibiotics in urban road rainwater runoff, including a collection frame 1, a protective frame 11 is installed on one side of the collection frame 1, a rainwater collection turntable 13 is rotatably installed in the middle of the upper end of the collection frame 1, a pressurized flushing device 14 is installed on the side of the collection frame 1 close to the rainwater collection turntable 13, a dynamic negative pressure control box 15 is installed on the side of the collection frame 1 close to the pressurized flushing device 14, a power distribution control device 12 is installed on the outer surface of the collection frame 1, collection tubes 16 are evenly arranged in the collection frame 1, and an adjustable anti-blocking mechanism 2 and a dynamic storage switching mechanism 4 are also included;

[0051] The adjustable anti-clogging mechanism 2 is provided on the rainwater collection turntable 13 and is used for dynamic adjustment of sewage collection;

[0052] The dynamic storage switching mechanism 4 is provided in the collection rack 1 and is used for automatic collection and storage of rainwater antibiotics;

[0053] Specifically, such as Figure 2 As shown, the electric cylinder 21 is installed on the rainwater collecting turntable 13, and a shaft connecting plate is installed on the driving shaft of the electric cylinder 21, and a support rod 22 is fixedly installed on the end of the connecting plate away from the driving shaft, one end of the support rod 22 is fixedly connected to a dirt pushing plate 23, and the other end of the support rod 22 is fixedly connected to a baffle 24, and the dirt pushing plate 23 and the baffle 24 are both slidably installed on the rainwater collecting turntable 13, and a first filter screen 25 is provided at the bottom of the dirt pushing plate 23 and the baffle 24, and the first filter screen 25 is fixedly installed on the rainwater collecting turntable 13, and a compression and tension spring 26 is evenly fixedly connected to the dirt pushing plate 23, and the compression and tension spring 26 is fixedly connected to the rainwater collecting turntable 13 at one end away from the dirt pushing plate 23;

[0054] Among them, an electric control cylinder is installed at the bottom of the rainwater collecting turntable 13, and the electric cylinder is electrically connected to the power distribution control device 12. At the same time, a water flow monitor is installed in the rainwater collecting turntable 13. The water flow flushing speed and flow rate in the rainwater collecting turntable 13 are detected, and an electrical signal is sent to the rainwater collecting turntable 13. The core control cabinet of the rainwater collecting turntable 13 automatically adjusts and drives the electric control cylinder at the bottom of the rainwater collecting turntable 13, adjusts the angle of the rainwater collecting turntable 13 on the collection frame 1, controls the flow speed of the water on the rainwater collecting turntable 13, and reduces the uneven flushing of local water flow causing blockage of the first filter 25.

[0055] At the same time, a water pressure sensor is installed on the baffle 24. When impurities on the first filter screen 25 cause clogging of the first filter screen 25, the water flow on the surface of the first filter screen 25 will gather. At this time, the gathered water pressure will generate a certain pressure on the surface of the baffle 24. When the water pressure sensor on the surface of the baffle 24 detects that the water pressure exceeds the threshold, the water pressure sensor will send an electrical signal to the distribution control device 12. The distribution control device 12 sends a control signal to the electric cylinder 21, which will start the extension of the electric cylinder 21. The extension of the electric cylinder 21 will drive the support rod 22 to collect rainwater. The inner wall of the collecting turntable 13 slides downward, and at this time, the sliding of the support rod 22 will drive the dirt pushing plate 23 and the baffle 24 to slide synchronously along the inner wall of the rainwater collecting turntable 13. At this time, the dirt pushing plate 23 begins to push the impurities on the surface of the first filter screen 25 down along the rainwater collecting turntable 13, and the baffle 24 is closed to the rainwater collecting turntable 13 from the initial state to gradually separate from the rainwater collecting turntable 13. At this time, the impurities on the first filter screen 25 will be pushed down by the dirt pushing plate 23 and the separation port of the baffle 24 and the rainwater collecting turntable 13. At this time, the motor returns to its position again, thereby completing a cleaning cycle.

[0056] At the same time, when the equipment has finished a single collection, the power distribution control device 12 will drive the boost flushing device 14 to start. The boost flushing device 14 is connected to the flushing head 27 through a pipeline. The flushing head 27 sprays and flushes the key sampling inlet and filter area to remove any impurities that may remain in the equipment, ensuring a clean start.

[0057] Furthermore, the rainwater collection turntable 13 is evenly equipped with flushing heads 27 near the bottom of the compression and tension spring 26. The flushing heads 27 are fixedly connected to the pressurized flushing device 14 through a hose. A guide groove is symmetrically opened at the bottom of the end of the rainwater collection turntable 13 away from the flushing head 27, and a guide cover 28 is fixedly installed on the outside of the guide groove. A waterproof sealing gasket is installed at the connection between the guide cover 28 and the guide groove. A guide pipe 29 is fixedly connected to the bottom of the guide cover 28. The end of the guide pipe 29 away from the guide cover 28 is fixedly connected to the purification chamber 31. Both sides of the purification chamber 31 are slidably mounted on the inner wall of the collection frame 1.

[0058] Among them, the bottom of the rainwater collection turntable 13 and the purification chamber 31 are set as a titanium alloy matrix nano-ceramic coating flow path, and the filter plate frame 32 is installed with a three-stage in-situ dynamic filtration module, a deep-cold independent storage unit and a multi-parameter intelligent trigger system; at the same time, the nano-ceramic coating is formed by TiO2-Al2O3 by plasma spraying, with a surface roughness Ra≤0.1μm and a water contact angle>150°. The three-stage in-situ dynamic filtration module consists of a second filter screen 33, a glass fiber membrane 34 and a hydrophilic PTFE membrane 35, and the deep-cold storage unit includes a semiconductor refrigeration module and a collection tube 16 with pre-packaged anti-degradation agent.

[0059] Specifically, such as Figure 5 and Figure 6As shown, the filter plate rack 32 is slidably installed in the purification chamber 31, and the second filter screen 33, the glass fiber membrane 34 and the hydrophilic PTFE membrane 35 are respectively installed in the filter plate rack 32. The second filter screen 33 is installed on the inner wall of the upper end of the filter plate rack 32, and the second filter screen 33 is installed on the inner wall of the middle part of the filter plate rack 32. The hydrophilic PTFE membrane 35 is installed on the filter plate rack 32 near the bottom of the glass fiber membrane 34. The collection frame 1, the filter plate rack 32 and the purification chamber 31 are all provided with a dynamic adjustment groove, and the dynamic adjustment groove is installed with an electric control valve on the side close to the dynamic negative pressure control box 15;

[0060] Among them, an electric control valve is installed on one side of the dynamic negative pressure control box 15 and is electrically connected to the flow meter installed in the rainwater collection turntable 13. The flow in the rainwater collection turntable 13 can be detected in real time through the flow meter, and the electric control valve on one side of the dynamic negative pressure control box 15 can be controlled to start through the flow meter valve control, so that the collection of rainwater can be automatically regulated in heavy rain or extreme weather to prevent excessive rainwater flow from causing load blockage of the three-stage in-situ dynamic filtration module.

[0061] Furthermore, the upper end of the discharge pipe 36 is fixedly connected to the bottom of the purification bin 31, and the lower end of the discharge pipe 36 is fixedly installed with a valve control device 37. The bottom of the valve control device 37 is connected to a liquid infusion tube, and one side of the valve control device 37 is fixedly connected to a drainage pipe 38. The end of the drainage pipe 38 away from the valve control device 37 is fixedly connected to a liquid collecting funnel 39. Both ends of the liquid collecting funnel 39 are slidably installed in the collection rack 1. An isolation plate is installed on the outer surface of the upper end of the discharge pipe 36, and both ends of the isolation plate are slidably installed on the inner wall of the collection rack 1 for isolating and controlling the temperature of the bottom of the collection rack 1.

[0062] Among them, the valve control device 37 is electrically connected to the flow meter in the rainwater collection turntable 13. When in special extreme environments, it can be adjusted through the discharge pipe 36, and the excess rainwater collected can be automatically discharged through the drain pipe 38 under the valve control conversion of the valve control device 37, so that the preliminary angle adjustment of the rainwater collection turntable 13 can be achieved - flushing of the flushing head 27, and dynamic valve control of the dynamic negative pressure control box 15 and the valve control device 37 can realize dynamic collection of rainwater, which not only reduces the blockage of the second filter 33, the glass fiber membrane 34 and the hydrophilic PTFE membrane 35, but also the present invention can flexibly respond to collection under different extreme weather conditions, and prevent equipment blockage caused by uneven single collection.

[0063] Specifically, the main driving wheel 41 is symmetrically mounted on the inner wall of the collection frame 1 for rotation. A micro motor is mounted on the outer surface of the collection frame 1 near the main driving wheel 41, and the driving shaft of the micro motor is fixedly mounted in the middle of the main driving wheel 41. A driven wheel 42 is rotatably mounted on one side of the collection frame 1 near the main driving wheel 41. An L-shaped cross-section driving disk 43 is slidably mounted on the outer surfaces of the main driving wheel 41 and the driven wheel 42. The L-shaped cross-section driving disk 43 is rotatably mounted on the inner wall of the collection frame 1, and a horizontal pull plate 44 is rotatably connected to the L-shaped cross-section driving disk 43.

[0064] Among them, this solution adopts an L-shaped cross-section driving disk 43 as the main rotation, and uses a horizontal pull plate 44 to assist in pulling the balance disk 45 to rotate on the inner wall of the collection rack 1. The reverse rotation of the horizontal pull plate 44 and the real-time installation shaft 49 drive the storage rack 47 to always be horizontal. At the same time, the solution can increase the number of storage racks 47 according to the collection needs of the collection tubes 16. By installing the storage rack 47 on the installation shaft 49, different numbers of collection tubes 16 can be collected.

[0065] Furthermore, a mounting shaft 49 is fixedly connected to the middle of one end of the horizontal pull plate 44 away from the L-shaped cross-section driving disk 43, and a balancing disk 45 is rotatably connected to the outer surface of the mounting shaft 49. The middle part of the balancing disk 45 is rotatably connected to the inner wall of the collection rack 1. A storage rack 47 is fixedly mounted on the mounting shaft 49, and a test tube cover 48 is evenly fixedly connected to the bottom of the storage rack 47. The collection tube 16 is installed in the test tube cover 48. A positioning monitoring device 46 is installed on the inner wall of the collection rack 1 near the upper side of the balancing disk 45. A liquid level monitoring device 401 is installed on the inner wall of the collection rack 1 near the dynamic negative pressure control box 15 for monitoring the liquid level in the collection tube 16;

[0066] Among them, the positioning and rotation of the balance disk 45 can be achieved under the dynamic control of the positioning monitoring device 46 and the liquid level monitoring device 401. At the same time, the liquid level height of the collection tube 16 can be detected by the liquid level monitoring device 401, thereby reducing the occurrence of excessive single collection. At the same time, this solution realizes the horizontal switching of the storage rack 47 through the linkage effect of the L-shaped cross-section driving disk 43, the horizontal pull plate 44 and the balance disk 45 structure, so that the storage rack 47 always remains horizontal, thereby reducing the tilt of the collection tube 16. At the same time, a deep cold storage unit including a semiconductor refrigeration module is installed at the bottom of the protective frame 11 for constant temperature storage of the collection tube 16 to reduce the oxidative decomposition of antibiotics.

[0067] Example 2;

[0068] Preparation and Cleaning: First, select a location representative of the road's stormwater characteristics, safe, and easily accessible for maintenance. After installation, the device will automatically or manually undergo a high-pressure flush. Using the booster flushing device 14, high-pressure water is ejected through the flushing head 27, flushing the critical sampling inlet and filter area, removing any remaining impurities and ensuring a clean start.

[0069] Monitoring and triggering: A sensor is installed at the entrance of the rainwater collection turntable 13 to continuously monitor the water level or flow in the drainage pipe. When the rainwater flow reaches a preset "sampling required" threshold, the sensor sends a signal, automatically initiating the sampling process. The first step is usually to open a preliminary filter.

[0070] Dynamic filtration and anti-blocking:

[0071] The system will automatically adjust the angle of the filter device below according to the size of the rainwater flow at the entrance, optimize the filtering effect. At the same time, dynamically control the opening of the drainage valve of the dynamic negative pressure control box 15. The function of this valve is to shunt part of the water to prevent the filter device and the collection container in the subsequent filter plate rack 32 from being blocked due to too much water and too many impurities.

[0072] At the same time, in this scheme, by setting the titanium alloy base nanometer ceramic coating flow path at the bottom of the rainwater collection turntable 13 and the purification bin 31, installing a three-stage in-situ dynamic filtration module, a deep cooling independent storage unit and a multi-parameter intelligent triggering system in the filter plate rack 32; At the same time, the nanometer ceramic coating is formed by TiO2-Al2O3 through plasma spraying, the surface roughness Ra≤0.1μm, the water contact angle is >150°, the three-stage in-situ dynamic filtration module is composed of the second filter screen 33, the glass fiber membrane 34 and the hydrophilic PTFE membrane 35. Special surface treatment such as inert coating, hydrophilic / hydrophobic modification, reducing active adsorption sites, etc. greatly reduces the interaction force between the target antibiotic and the surface of the container / pipeline material, significantly reduces or even basically eliminates the adsorption loss; Not only can it reduce the loss introduced in the sampling link, so that the concentration detected in the subsequent laboratory is closer to the true value, and improve the credibility and comparability of the detection results at the low concentration level. Not only for antibiotics, but also for other trace organic pollutants such as some drugs and endocrine disruptors, which are also effective for the collection of other trace organic pollutants such as some drugs and endocrine disruptors, which improves the versatility of the equipment.

[0073] Constant temperature collection and storage: The collected rainwater flows into the sample collection tube 16 after filtration. The inner wall of the collection rack 1 is equipped with a liquid level infrared detection sensor to continuously monitor the water level. When the collection tube 16 is almost full and reaches the preset liquid level, the system will: automatically start a micro motor on the main drive wheel 41 to switch to the empty collection tube 16 for continuous collection. At the same time, the temperature control and refrigeration of the stored sample are carried out through the deep cooling storage unit including a semiconductor refrigeration module and a pre-packaged anti-degradation agent collection tube 16, to ensure the stability of the sample during collection.

[0074] Complete recovery and notification:

[0075] When the preset sampling amount is completed (or the container is full), the liquid level sensor will send a signal. After receiving the signal, the system control center: stops the entire rainwater collection process. A cleaning device is started to push away and remove the accumulated leaves, sand and other residues on the filter screen at the entrance. At the same time, the information of "sampling completion" (including time, state, etc.) is automatically sent to the remote cloud platform to inform the staff that the sample can be recovered.

[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0077] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff, comprising a collection frame (1), a protective frame (11) installed on one side of the collection frame (1), and a rainwater collection turntable (13) rotatably installed in the middle of the upper end of the collection frame (1), characterized in that: A pressurized flushing device (14) is installed on one side of the collection frame (1) close to the rainwater collection turntable (13); a dynamic negative pressure control box (15) is installed on one side of the collection frame (1) close to the pressurized flushing device (14); a power distribution control device (12) is installed on the outer surface of the collection frame (1); collection pipes (16) are evenly arranged in the collection frame (1), and the collection frame (1) also includes an adjustable anti-blocking mechanism (2) and a dynamic storage switching mechanism (4); The adjustable anti-clogging mechanism (2) is arranged on the rainwater collection turntable (13), and the adjustable anti-clogging mechanism (2) is used for dynamic adjustment of sewage collection; The dynamic storage switching mechanism (4) is arranged in the collection rack (1), and the dynamic storage switching mechanism (4) is used for automatically collecting and storing rainwater antibiotics.

2. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 1 is characterized by: The adjustable anti-blocking mechanism (2) comprises an electric cylinder (21), the electric cylinder (21) is mounted on the rainwater collecting turntable (13), a shaft connecting plate is mounted on the driving shaft of the electric cylinder (21), and a support rod (22) is fixedly mounted on one end of the connecting plate away from the driving shaft, one end of the support rod (22) is fixedly connected to a dirt pushing plate (23), and the other end of the support rod (22) is fixedly connected to a baffle (24), the dirt pushing plate (23) and the baffle (24) are both slidably mounted on the rainwater collecting turntable (13), a first filter screen (25) is provided at the bottom of the dirt pushing plate (23) and the baffle (24), the first filter screen (25) is fixedly mounted on the rainwater collecting turntable (13), a compression and tension spring (26) is evenly fixedly connected to the dirt pushing plate (23), and the compression and tension spring (26) is fixedly connected to the rainwater collecting turntable (13) at one end away from the dirt pushing plate (23).

3. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 2, characterized in that: The rainwater collecting turntable (13) is evenly provided with a flushing head (27) near the bottom of the compression and tension spring (26). The flushing head (27) is fixedly connected to the pressurized flushing device (14) through a hose. A guide groove is symmetrically provided at the bottom of one end of the rainwater collecting turntable (13) away from the flushing head (27), and a guide cover (28) is fixedly installed on the outside of the guide groove. A waterproof sealing gasket is installed at the connection between the guide cover (28) and the guide groove. A guide pipe (29) is fixedly connected to the bottom of the guide cover (28). The guide pipe (29) is fixedly connected to a purification chamber (31) at one end away from the guide cover (28). Both sides of the purification chamber (31) are slidably installed on the inner wall of the collection frame (1).

4. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 1 is characterized in that: The adjustable anti-clogging mechanism (2) also includes a dynamic filtering component (3), which includes a filter plate frame (32), the filter plate frame (32) is slidably installed in the purification chamber (31), and the filter plate frame (32) is respectively installed with a second filter screen (33), a glass fiber membrane (34) and a hydrophilic PTFE membrane (35), the second filter screen (33) is installed on the inner wall of the upper end of the filter plate frame (32), and the second filter screen (33) is installed on the inner wall of the middle part of the filter plate frame (32), and the hydrophilic PTFE membrane (35) is installed on the filter plate frame (32) near the bottom of the glass fiber membrane (34). The collection frame (1), the filter plate frame (32) and the purification chamber (31) are all provided with a dynamic adjustment groove, and the dynamic adjustment groove is installed with an electric control valve on the side close to the dynamic negative pressure control box (15).

5. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 4, characterized in that: The dynamic filtering assembly (3) further comprises a feed pipe (36), the upper end of which is fixedly connected to the bottom of the purification bin (31), the lower end of which is fixedly mounted with a valve control device (37), the bottom of which is connected to a liquid infusion pipe, one side of which is fixedly connected to a liquid discharge pipe (38), the end of which, away from the valve control device (37), is fixedly connected to a liquid collecting funnel (39), the two ends of which are slidably mounted in the collection rack (1), the upper end of which is externally mounted with an isolation plate, and the two ends of which are slidably mounted on the inner wall of the collection rack (1), for isolating and controlling the temperature of the bottom of the collection rack (1).

6. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 1, characterized in that: The dynamic storage switching mechanism (4) comprises a main driving wheel (41), the main driving wheel (41) is symmetrically mounted on the inner wall of the collection frame (1), a micro motor is mounted on the outer surface of the collection frame (1) close to the main driving wheel (41), and the micro motor drive shaft is fixedly mounted on the middle of the main driving wheel (41), a driven wheel (42) is rotatably mounted on one side of the collection frame (1) close to the main driving wheel (41), an L-shaped cross-section driving disk (43) is slidably mounted on the outer surfaces of the main driving wheel (41) and the driven wheel (42), the L-shaped cross-section driving disk (43) is rotatably mounted on the inner wall of the collection frame (1), and a horizontal pull plate (44) is rotatably connected to the L-shaped cross-section driving disk (43).

7. The anti-adsorption low-temperature automatic sampling device for antibiotics in urban road rainwater runoff according to claim 6, characterized in that: The middle part of one end of the horizontal pull plate (44) away from the L-shaped cross-section driving disk (43) is fixedly connected to a mounting shaft (49); the outer surface of the mounting shaft (49) is rotatably connected to a balancing disk (45); the middle part of the balancing disk (45) is rotatably connected to the inner wall of the collection rack (1); a storage rack (47) is fixedly mounted on the mounting shaft (49); a test tube cover (48) is evenly fixedly connected to the bottom of the storage rack (47); the collection tube (16) is mounted in the test tube cover (48); a positioning monitoring device (46) is installed on the inner wall of the collection rack (1) near the upper side of the balancing disk (45); and a liquid level monitoring device (401) is installed on the inner wall of the collection rack (1) near the side of the dynamic negative pressure control box (15) for monitoring the liquid level in the collection tube (16).

8. A method for automatically sampling antibiotics in urban road rainwater runoff at low temperatures with an anti-adsorption method, adapted for use with the device for automatically sampling antibiotics in urban road rainwater runoff at low temperatures as claimed in any one of claims 1 to 7, characterized in that: include: S1, sampler pre-treatment and cleaning: select a location that is representative of the road rainwater characteristics, safe and easy to maintain to install the sampler; after installation, the device will automatically perform a high-pressure flushing through the booster flushing device (14) after power is turned on: high-pressure water is sprayed through the flushing head (27) to flush the key sampling inlet and filter area, remove any impurities that may remain in the device, and ensure a clean start; S2, dynamic monitoring and collection: a sensor is installed at the rainwater inlet to continuously monitor the water level or water flow in the drainage pipe; when the rainwater flow reaches the preset "sampling required" threshold, the sensor will send a signal to automatically start the sampling program, and the driving cylinder at the bottom of the rainwater collection turntable (13) will adjust the angle of the rainwater collection turntable (13) to control the water flow speed through the rainwater collection turntable (13) angle controller; S3, dynamic control and filtration: The system automatically adjusts the angle of the rainwater collection turntable (13) below according to the size of the rainwater flow at the inlet to optimize the filtration effect. At the same time, it dynamically controls the opening of the drainage valve in a dynamic negative pressure control box (15). The function of this valve is to divert part of the water to prevent the subsequent filtration device and collection container from being blocked due to excessive water and impurities. S4, constant temperature collection and storage: the micro motor in the middle of the main driving wheel (41) is started and stopped by the positioning monitoring device (46), and the liquid level monitoring device (401) installed on the inner wall of the collection rack (1) is used to monitor the liquid level in the collection tube (16). When the liquid level in the collection tube (16) is higher than the threshold, the micro motor is controlled to rotate through electrical connection to switch the collection, and the temperature of the collected sample is controlled at the same time; S5, sample recovery and detection: When a certain amount of rainwater is collected in the collection tube (16), the liquid level monitoring device (401) monitors and sends a signal to the power distribution control device (12), causing the power distribution control device (12) to stop collecting rainwater. At this time, the adjustable anti-blocking mechanism (2) starts to push and clean the filter residue above the rainwater collection turntable (13). At the same time, the collection information is sent to the cloud platform through the power distribution control device (12) to prompt the end of sample collection in this area.

9. The method for automatic low-temperature sampling of antibiotics in urban road rainwater runoff according to claim 8, characterized in that: The bottom of the rainwater collection turntable (13) and the purification chamber (31) are provided with a titanium alloy matrix nano-ceramic coating flow path, and the filter plate frame (32) is equipped with a three-stage in-situ dynamic filtration module, a deep-cold independent storage unit and a multi-parameter intelligent triggering system.

10. The method for automatic low-temperature sampling of antibiotics in urban road rainwater runoff according to claim 9, characterized in that: The nano-ceramic coating is formed by plasma spraying TiO2-Al2O3, with a surface roughness Ra≤0.1μm and a water contact angle>150°. The three-stage in-situ dynamic filtration module consists of a second filter (33), a glass fiber membrane (34) and a hydrophilic PTFE membrane (35). The deep cold storage unit includes a semiconductor refrigeration module and a collection tube (16) for pre-packaging an anti-degradation agent.

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